Health
Update
UPDATE ON RECOMMENDATIONS FOR THE USE OF ROTAVIRUS VACCINES

The Delaware Division of Public Health (DPH) is forwarding this Health Alert from the Centers for Disease Control and Prevention (CDC).

Summary

FDA is updating its recommendations on both Rotarix and RotaTeq, vaccines for the prevention of rotavirus disease in infants. Based on
careful evaluation of a variety of scientific information, FDA has determined it is appropriate for clinicians and health care
professionals to resume the use of Rotarix and to continue the use of RotaTeq.

Background

On March 22, 2010, FDA provided an early
communication regarding Rotarix, manufactured by GlaxoSmithKline Biologicals (GSK). At that time, FDA recommended that clinicians and
public health professionals in the United States temporarily suspend the use of Rotarix while the agency and manufacturer investigated
the finding of DNA from porcine circovirus type 1 (PCV1) in the vaccine. Since that time, both FDA and GSK have confirmed the presence of
PCV1 in the vaccine. On May 6, 2010, FDA
provided information about RotaTeq, manufactured by Merck & Co, Inc. FDA indicated that preliminary studies conducted by Merck
identified fragments of DNA from PCV1 and from a related porcine circovirus type 2 (PCV2) in RotaTeq. FDA noted that it would seek input
from its Vaccines and Related Biological Products Advisory Committee (VRBPAC) and provide updates in the near future.

Updated Recommendations

FDA has evaluated laboratory results from the manufacturers and its own laboratories. In addition, FDA’s VRBPAC convened on
May 7, 2010 to discuss the findings of PCV and PCV DNA in rotavirus vaccines. Based on a careful evaluation of this information, a
thorough review of the scientific literature, and input from scientific and public health experts, the Agency is revising its
recommendation to temporarily suspend use of the Rotarix vaccine. FDA has determined it is appropriate for clinicians and health care
professionals to resume the use of Rotarix and to continue the use of RotaTeq.

FDA considered the following information in its decision:

Both vaccines have strong safety records, including clinical trials involving tens of thousands of patients as well as clinical
experience with millions of recipients. FDA has no evidence that either PCV1 or PCV2 poses a safety risk in humans, and notes that
neither is known to cause infection or illness in humans.

The benefits of the vaccines are substantial, and include prevention of hospitalization for severe rotavirus disease in the U.S. and
of death in other parts of the world. The benefits of the vaccines, which are known, outweigh the risk, which is theoretical.

Next Steps

FDA is working with each of the manufacturers (GSK and Merck) to update the labeling for both Rotarix and RotaTeq vaccines to include
information about the presence of PCV1 (Rotarix) and DNA from PCV1 and PCV2 (RotaTeq) in the vaccines.

FDA is working with each of the manufacturers to plan the appropriate follow up studies, taking into account the input received from
members of the VRBPAC on May 7, 2010.

FDA and the manufacturers will continue to investigate the findings of PCV in rotavirus vaccines, and will evaluate information from
ongoing testing by FDA and the manufacturers. As noted by the firm during the May 7, 2010, VRBPAC meeting, GSK plans to re-derive its
vaccine, in consultation with FDA. Merck is in the early stages of its investigation, and has not yet determined next steps in this
regard.

Updated Information for Clinicians and Public Health Professionals

FDA has determined it is appropriate for clinicians and health care professionals to resume the use of Rotarix and to continue the use of
RotaTeq. FDA also recommends that clinicians and public health professionals inform parents of the findings of PCV DNA or PCV in
rotavirus vaccines, and that there is no evidence that these findings pose a safety risk in humans. Both the prescribing information and
patient labeling will be revised to include this information.

The benefits of vaccination against rotavirus disease are substantial, both in the United States and the developing world and far
outweigh any theoretical risk posed by PCV types 1 and 2. The safety record of both rotavirus vaccines is excellent.

FDA will keep the public and clinical community updated through www.fda.gov. For questions, please
contact the GSK response center at 1-888-825-5249 or call the Delaware Division of Public Health Immunization Program at 1-800-282-8672.

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